This is because you are trying to authenticate using the username and password guest remotely. Starting with RabbitMQ 3.3 you need to create a new account to use remotely, and guest/guest can only be used locally. This is taken from the change log here. 25603 prevent access using the default...

The solution I implemented was to do the publishing inside a new transaction after the commit of the main transaction. The first call : Entity entity = save(entity); publishFailSafeAfterSuccessfulTransaction("routingkey", "Entity was updated"); This method register to do the publishing after the main transaction committed. public void publishFailSafeAfterSuccessfulTransaction(final String routingKey, final...

It's a bug - please open a JIRA issue. There is not a workaround, unfortunately; it needs a patch. The use of transactions with RabbitMQ is quite rare, especially on the consumer side - can you explain why you need them?...

It's not clear what you mean; the listener has to be configured to consume from some queue, or queues. If you that mean you wish to externalize the queue name(s) rather than hard-coding in java, you can use a property placeholder ${...} or a SpEL expression #{...} for the queue...

You can use synchronous basic.get method. Wrap it in a for loop or add sort of a counter. And quite the app once you reach desired number. This method provides a direct access to the messages in a queue using a synchronous dialogue that is designed for specific types of...

In short yes, but it would be nice to understand your exact case. From https://www.rabbitmq.com/partitions.html During a network partition While a network partition is in place, the two (or more!) sides of the cluster can evolve independently, with both sides thinking the other has crashed. Queues, bindings, exchanges can be...

RabbitMQ is using by default the AMQP version 0.9.1. According to the AMQP protocol specification at page 31, a field-table can contains 4 billions entries: long-uint = 4*OCTET field-table = long-uint *field-value-pair A long-string entry can have a length up to 4 billions octet: long-string = long-uint *OCTET ; length...

In the lib at the line your stack trace refers to seems to lack a name of the queue, if you give your queue a name - maybe you get better stack trace? https://github.com/postwait/node-amqp/blob/master/lib/queue.js#L398...

You can certainly have a central RabbitMQ instance/cluster that can be shared by different applications and different teams. If you want to go down this route, I'd recommend isolating data that belongs to each team from others' using Rabbit's access control mechanisms. Virtual hosts allow users to share Rabbit server/cluster...

You have different possibilities, just to figure out two of them: a) are you trying this one? MQTT Client A -> Node.js/mosca Broker 1 bridged -> RabbitMQ Broker 2 b) why not this one? Both Clients can exchange messages by publishing and subscribing to the same topics in the Broker...

"and everytime that the subscriber is up he receives all the messages, and if i keep sending the same message my consumer will get" as stated in the readme of the project "The last value exchange acts like a direct exchange" so this is the expected behaviour. The only...

You can use the RPC model as described here: https://www.rabbitmq.com/tutorials/tutorial-six-java.html In this way you can send-back to the publisher a message with the reason. You can also considerer Dead Letter Exchanges extension, but you can't change the message, so you are just informed that your message has been rejected. With...

I don't think the injection works at all, since your trying to inject static fields, which doesn't work with Spring. Remove the static identifier from your fields (and from your methods, because there is no reason they're static too) and your application should work fine. The sender works, because the...

what is the purpose of declaring the exchange on the consumer side? It lets one start the consumer process before the producer process has been started. Without it, if the consumer was started first then it would error. Having the flexibility to start the consumer first is useful when...

I found the cause and the solution some days back, and even though I was "sure" I wasn't acknowleding twice, I still was :) The reason: public function theCallbackMethod(AMQPMessage $message) { try { //do something here } catch (ExceptionOne $e) { $channel->reject(/* ... */, false); } catch (ExceptionTwo $e) {...

Endpoints vs Servers NServiceBus uses the concept of endpoints. An endpoint is related to a queue on which it receives messages. If this endpoint is scaled out for either high availability or performance then you still have one queue (with RabbitMQ). So if you would have an instance running on...

Answering to save people time: "The problem is resolved, the company we use for sending the SMS restarted their servers and it worked fine. Many man hours wasted on this before it even got to me hah. Thanks for your time guys."

The basic.nack command is apparently a RabbitMQ extension, which extends the functionality of basic.reject to include a bulk processing mode. Both include a "bit" (i.e. boolean) flag of requeue, so you actually have several choices: nack/reject with requeue=1: the message will be returned to the queue it came from as...

Like I said, it depends on your use case, but I can assume you are looking for something from spring amqp out-of-the-box. just have a look at BlockingQueueConsumer, you can i.e. prefetch one message if you want, then start it manually. Please be aware that you need choose solution according...

When you create the model you need to set the QOS on it. Here is how we would do it in C#: var _model = rabbitConnection.CreateModel(); // Configure the Quality of service for the model. Below is how what each setting means. // BasicQos(0="Dont send me a new message untill...

I'm not aware of one but have only done a cursory search. There are many Julia libraries which simply wrap an existing and well-understood C API. While getting the package build and install correct this way can be slightly tricky, it saves re-implementing complex protocols. There doesn't seem to be...

RabbitMQ supports this type of pattern. Have a look at the RPC tutorial for a bootstrap of how to implement this pattern. It can be implemented in different way depending of your needs: direct reply queue, queue will be created and used only for the reply associated to the request...

There isn't really a "server side" with a message-based system; rather, the RabbitMQ service sits somewhere and relays messages to and from any number of producers and consumers. Depending on the hardware you have available, and the amount of processing being performed, these could all be on the same server,...

RabbitMQ broke QoS settings in version 3.3. You need to upgrade celery to at least 3.1.11 (changelog) and kombu to at least 3.0.15 (changelog). You should use the latest versions. I hit this exact same behavior when 3.3 was released. RabbitMQ flipped the default behavior of the prefetch_count flag. Before...

Have you tried specifying the q: parameter? EasyNetQ.Hosepipe.exe dump s:localhost u:guest p:guest q:my_queue o:C:\temp\messages I haven't used hosepipe, but this is from the usage.txt in the hosepipe project: https://github.com/EasyNetQ/EasyNetQ/blob/master/Source/EasyNetQ.Hosepipe/Usage.txt UPDATE: HosePipe now supports a 'q' parameter to read from error queues that don't use the standard naming convention: https://github.com/nvmlabs/EasyNetQ/commit/7945ff0f2c9d2e17088f109a542219fb5b11c3ab...

I suppose you are using Channel only for your consumer and not for other operations like publish etc.. In your case the only potential problem is here: channel.basicAck(deliveryTag, false); because you call this across two thread, btw this operation is safe, if you see the java code: the class ChannelN.java...

You do not have RabbitMQ server installed. Luckily this is pretty easy to do. You mentioned you are using CentOS, here you can download RabbitMQ server: https://www.rabbitmq.com/install-rpm.html There are a couple of steps you will need to follow, including installing Erlang. The Spring example assumes you already know a bit...

I believe this is a subtle timing issue, combined with the fact that the RabbitMQ result backend sends task results as messages and can only be retrieved once. Short answer upfront: avoid calling result.get() until you really need the final result: while not result.ready(): if result.state == "PROGRESS": print("progress={}".format(result.info['step'])) time.sleep(1)...

the PCF data services such as mysql, rabbitmq, and redis are currently only available for enterprise PCF customers when using PWS. if you contact pivotal-cf-feedback at pivotallabs dot com we can provide more details on the services roadmap for PWS.

In order to communicate with the server on a different port you need to first tell RabbitMQ what port it should listen on. The easiest way is to customize it through environment variables: If you need to customise names, ports, locations, it is easiest to configure environment variables in the...

Defining a queue as "Durable" has the added benefit of surviving a rabbit or server restart. The downside is that to accomplish this it writes the data to disk, which is costly. If your greatest concern is throughput and it's not a problem that you'd drop a few messages in...

If you are connecting to a broker that supports only MQTT 3.1 (not 3.1.1 compliant), you should pass these additional options: { protocolId: 'MQIsdp', protocolVersion: 3 } This is confirmed on RabbitMQ 3.2.4.... and on Mosquitto < 1.3. Mosquitto version 1.3 and 1.4 works fine without those....

It sounds like the issue is celery's default pre-fetch behavior. Each worker will reserve a set number of tasks ahead of time while it is currently at maximum capacity and this is known as the Prefetch Multiplier. The reason it does that is so that when you have a high...

You usually don't test code like this as a Unittest since the result would more likely tell you that your server is installed correctly and not that your code is working. Do you test if PDO returns a valid database connection? It could make sense if you test your installation...

PhantomJS is just another browser. That's exactly what the RabbitMQ Web-Stomp Plugin is for. It is based on SockJS which provides a web socket connection between browser and server. If web sockets are not available there are cross-browser fallbacks. PhantomJS supports web sockets from version 2 onwards. If you don't...

Q2 has two bindings that both will match single message. According to AMQP 0.9.1 specification, section 1.7.2.3. Method queue.bind (page 35): A server MUST not deliver the same message more than once to a queue, even if the queue has multiple bindings that match the message. Test scenario: A client...

That code (com.rabbitmq.client) is in the underlying amqp-client (RabbitMQ Java client) code used by Spring AMQP. To me this looks like there is a while loop that continuously blocks on getting some input on a socket from the RabbitMQ server. Yes, but when it blocks waiting for data, it does...

The best way to handle something like this is a Saga via Automatonymous. Make retries explicit and part of your domain. We already do retries at the lower level, if an exception is thrown it's tossed back on the queue and retried until max retries are hit. Then the message...

Avoids creating connection, channel and exchange per iteration. Instead creates them before the iteration and closes them after the loop. They are costly operations (especially connection and channel). connection and channel should be created and reused. $connection = new AMQPConnection('localhost', 5672, 'guest', 'guest'); $channel = $connection->channel(); $channel->exchange_declare('test', 'direct', false, false,...

AMQP does not allow you to do this. According to this discussion, you can workaround this by having an intermediate exchange. Basically, you create a fanout exchange which connects directly to the exchange you are interested in. You have clients which binds queues to this intermediate exchange. When you decide...

Answering my own question; Celery sends a result message back for every task in the calling code. This message is sent back via the same AMPQ queue. This is why the tasks were working, but the queue kept filling up. We were not handling these results, or even interested in...

Turns out I had not created appropriate configuration files. In my case (Ubuntu 14.04), I had to create below two configuration files: $ cat /etc/rabbitmq/rabbitmq-env.conf RABBITMQ_NODE_IP_ADDRESS=<ip_of_ec2_instance> <ip_of_ec2_instance> has to be the internal IP that EC2 uses. Not the public IP that one uses to ssh into the instance. It can...

You can set both Per-Queue Message TTL and individual Per-Message TTL. If both set, the shortest one will be used. Messages with expired TTL removed from queue when they reach it head (see Caveats section for details). Also, from another answer about TTL in RabbitMQ: Messages with expired ttl will...

Your problem is caused by the transactional nature of your message handling. I mean this: container.setTransactionManager(transactionManager); What is happening is, that in some cases (probably some issue with message header, as you suggested) you encounter some error, and that is not being handled properly. The error propagates through and reaches...

Amqplib provide two parallel client APIs. One uses promises, and the other uses callbacks. You are free to choose which you prefer, they don't mix -- a channel from the promises API has only the promise-based methods, and likewise the callback API. The promise-based API is the "main" module in...

I finally found it, here it is for further reference 1/ get the latest rabbitmq-c and rabbitmq-objc libraries. 2/ make sure Cmake is updated (2.6 or better) 3/ install iOS-cmake 4/ in rabbitmq-c directory (change OSX_ARCHITECTURES and IOS_PLATFORM flags for simulator or device) mkdir build.ios && cd build.ios cmake -DCMAKE_TOOLCHAIN_FILE=/path/to/iOS.cmake...

Pinging the admin port will do nothing to keep the amqp connection(s) alive. You need to configure heartbeats to a low enough value to prevent the load balancer from dropping an "idle" connection. It looks like you might be using Spring Boot (based on the property name) and it doesn't...

It seems that erlang module requires older version of apt module. Look at this patch. Recently, in apt resource, parameters include_src and include_deb were substituted by one include parameter. To solve the problem please install apt module in version 1.8.0.

Since you are a Spring Framework user, consider using Spring AMQP. The RabbitTemplate uses cached channels over a single connection with the channel being checked out of the cache (and returned) for each operation. The default cache size is 1, so it generally needs to be configured for an environment...

Apparently there are many components to your application set up that is hard to take into account and suggest a straightforward answer. I would suggest that you should look into each design and identify I/O points, calls over the network and data volume exchanged over the network. Then depending on...

The celery app file should live in the core directory of your project, along the settings and all the other things as shown in the documentation that you posted. To define portable tasks it makes sense to put them in the app that is using them, as you pointed out,...

Use a topic exchange and have each consumer create it's own unique persistent queue and bind it to the exchange with a topic to which you want to subscribe. Publishing a message on the exchange will deliver that message to each queue bound to that exchange/topic. If one of your...

This is something that I've fought with, and found that the best solution is to install Erlang and RabbitMQ from standalone RPMs outside of yum; see Install Erlang in RMQ's documentation. Specifically, the stripped-down Erlang install provided by RabbitMQ (see here) should install easily, then allow you to install RMQ...

I need to send a message to a queue with name "myQueue" to the MQ server. Should I declare all required beans in spring, like Queue and etc for it. No. With out declaring beans like connection factory, exchange and queue you can not publish messages to queue. It seems...

Yes, it works on different machines. If you want to connect from a different computer just pass a different Host to your ConnectionFactory. If you can't connect from a different machine due to configuration problems, perhaps you are using the guest:guest user, which can only connect from localhost? https://www.rabbitmq.com/access-control.html...

From what I understand, you have basically two problems: Potential for loss/corruption of call data Database write performance The potential for loss/corruption of call data is being caused by a lack of reliability in the transmission of data from client to service. And it's not clear what is causing the...

Rather than put a bunch of singletons in your service, which leads to a bunch of static methods and so forth, you can specify a consumer factory with your subscription that passes those dependencies to your consumer. You can also use any of the supported containers (or even your own)...

Ok, I finally got this working. Spring uses a PayloadArgumentResolver to extract, convert and set the converted message to the method parameter annotated with @RabbitListener. Somehow we need to set the mappingJackson2MessageConverter into this object. So, in the CONSUMER app, we need to implement RabbitListenerConfigurer. By overriding configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) we...

Sorry, but it looks like you misunderstood AMQP protocol a bit. The message is published to the Exchange with the proper routingKey. The publisher (RabbitTemplate) doesn't need to know about queues at all. The queue is a part of receiver, subscriber to the queue. There is one more feature in...

Okay, so.. it was this: Creating a queue that expires to a DLX? Check. Creating the DLX? Check. Pushing data to the queue that expires? Nope. It was a scoping issue... I thought that I was looping over data that would publish to the queue that was expiring, but the...

The Spring AMQP is for you! You bind some custom queue to to that amq.rabbitmq.trace with appropriate pattern (e.g. publish.#) and configure SimpleMessageListenerContainer to receive messages from that queue. It can be done even with pretty simple config: @EnableRabbit and @RabbitListener on some POJO method. Anyway the Binding @Bean must...

I was able to recreate your issue with both pyodbc and pypyodbc. I also tried using WITH seq (AccountNo, rownum) AS ( SELECT AccountNo, ROW_NUMBER() OVER (ORDER BY Accountno) rownum FROM casa4 ) SELECT AccountNo FROM seq WHERE rownum BETWEEN 11 AND 20 When I run that in SSMS I...

Maybe a network issue? The default configuration handles 1 message at a time and the next is not sent by the broker until the ack is sent. Try increasing the prefetch on the listener container so the container always has a message available when the consumer thread is ready. Take...

I have found the problem, it was related to wrong configuration. So, to troubleshoot this problem: Check, that Queue declared in the Rabbit-Server has same parameters in spring-configurations. Good thing this is to remove completely queues from rabbit and start application. In the applications there could be several places where...

I would advise registering the IConnection as a singleton. To register the IConnection as a singleton in Unity you would use a ContainerControlledLifetimeManager, e.g. var connectionFactory = new ConnectionFactory { // Configure the connection factory }; unityContainer.RegisterInstance(connectionFactory); unityContainer.RegisterType<IConnection, AutorecoveringConnection>(new ContainerControlledLifetimeManager(), new InjectionMethod("init")); The AutorecoveringConnection instance, once resolved for the first...

This is the second report of such a problem, can you check the bindings of the message type to the queue? I believe the alpha has an issue where the published message types are not bound to the queue properly by default. Another user reported the same thing last week,...

Well, at the very least MQTT will accept JSON payloads, because we we use that ourselves. On your second point, its difficult to see how any inter-platform transport can avoid serialisation, as one end does not know the language or endian-ness of the other end....

Through some experimenting with the WCF API it doesn't appear like the client and the server are tightly coupled. I tried to bring up multiple instances of the client without the server coming up and there was no error. When I brought up the server it saw the message from...

I haven't figure this out but insted of using EasyNetQ.ManagementClient nuget package I do a web request to rabbit's api on http://ipadress:15672/api/queues and get JSON back in response with all the information that I need.

You can use the standard Java library to send messages to RabbitMQ like this: val factory = new ConnectionFactory() factory.setUri(serverUri) val channel = connection.createChannel() channel.queueDeclare(queue, true, false, false, null) channel.basicPublish("", queue, true, false, null, data) When using this in Play, you'd probably put all the logic up to basicPublish inside...

You probably need to use supervisord's user configuration directive to run the celery processes as a dedicated user instead of root. also you should explicity chdir to a working dir - either in your celery code or use the supervisor directory setting. If you want to rely on ~ working...

Queues are buckets of work that are waiting to be completed. If you only have 1 unit of work to be done, then you only need 1 queue. The reason to have more than 1 queue on an exchange is that you need to do different work on the same...

You can create a temporary queue by using the ?temporary=true query string parameter. With RabbitMQ, you can also dynamically create the queue name by using * as the queue name. Such as: x.ReceiveFrom("rabbitmq://localhost/vhost/*?temporary=true"); This would create a temporary queue with a randomly generated name that is deleted when the connection...